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Finding the Fourth Proportional to 21,993.91, 30,350.79 and 11,922.14

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Solution

The fourth proportional to 21,993.91, 30,350.79 and 11,922.14 is: 16,452.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,993.91 : 30,350.79 = 11,922.14 : x
  2. Step 2: Convert to fraction form
    21,993.91/30,350.79 = 11,922.14/x
  3. Step 3: Cross multiply
    21,993.91x = 30,350.79 × 11,922.14
  4. Step 4: Simplify right side
    21,993.91x = 361,846,367.49
  5. Step 5: Solve for x
    x = 361,846,367.49/21,993.91
  6. Step 6: Final answer
    x = 16,452.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.